The total mass of gas which fills a meteorogical balloon is 50kg. The balloon string is tied to a post which is fixed to the earth. Find the tension in the string the volume of the balloon is 110 metre cube and density of air is 1.3 kilogram per cubic metre

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

Prompta snowboarder stands at the top of a hill and decides to see if he can increase his speed on his next trip down the slope. describe one thing the snowboarder could do to incrlase his speed on the slope. explain why this would cause his speed toincrease relate one of newton's laws to this problem.

How much force must a locomotive exert on a 12840-kg boxcar to make it accelerate forward at 0.490 m/s2?